1 cup shredded part-skim mozzarella cheese (4 ounces)
¼ cup grated Parmesan or Romano cheese (1 ounce)
To prepare the sauce, in a large saucepan cook ground beef, onion, carrot, and garlic over medium-high heat until meat is brown and vegetables are tender. Drain off fat. Stir in the tomato sauce, tomato paste, water, and pepper. Bring to boiling; reduce heat. Simmer, covered, for 10 minutes, stirring occasionally.
Meanwhile, cook the lasagna noodles according to the package directions. Drain noodles; rinse with cold water. Drain well; set aside. For cheese filling, in a small bowl stir together the egg and ricotta cheese.
Lightly coat a 2-quart rectangular baking dish with cooking spray. Layer 3 noodles in the prepared baking dish. Spread with a third of the cheese filling. Top with a third of the sauce and a third of the mozzarella cheese. Repeat layers twice. Sprinkle with Parmesan cheese.
Bake, covered with foil, in a 375°F oven for 20 minutes. Uncover and bake for 5 minutes more or until heated through. Let stand for 10 minutes before serving.